Portable, electronic keyboard musical instrument



FIG. 1 is a front elevational view of a portable electronic keyboard musical instrument showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first end view of my new design, which is a left end view of FIG. 1; and,

FIG. 6 is a second end view of my new design, which is a right end view of FIG. 1. 

The ornamental design for portable electronic keyboard musical instrument, as shown and described. 